Glucono-1,5-Lactone or GdL is a neutral cyclic ester of gluconic acid, produced with the acid by fermentation of glucose. It is separated from the acid by crystallisation. GdL is a fine, white crystalline powder, freely soluble in water. It is practically odorless and has a slightly sweet taste. Non toxic, it is completely metabolized in the body like a carbohydrate. When added into an aqueous solution, GdL rapidly dissolves, and subsequently slowly hydrolyses to gluconic acid, producing a gentle acidification in the same way as lactic acid-producing bacteria. In solution both gluconic acid and GdL are always in balance. The equivalent point and the rate of transformation are related to concentration, temperature and pH.
Applications:
Controlled release acidulant
Mild acidulant
Curing accelerator
Leavening agent
Chelating agent
Preservative agent enhancer
Typical Specifications:
Appearance: Fine, white, crystalline powder
Purity: (same/more than)99%
Arsenic: (same/less than) 0.0003%
Heavy Metals (Pb): (same/less than) 0.002%
Reducing Substances: (same/less than) 0.5%
Regulatory:
Glucono-delta-lactone is supplied in accordance with the latest requirements of the United States Pharmacopeia (USP), the Food Chemicals Codex (FCC) and of Commission Regulation (EU) No 231/2012.
In Europe GdL is listed as a generally permitted food additive (E 575) and may be added to all foodstuffs, following the "quantum satis" principle, as long as no special regulation restricts the use. The US Food and Drug Administration (FDA) assigned GdL the
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